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Ocean warming as a trigger for irreversible retreat of the Antarctic ice sheet

Earth Sciences

Ocean warming as a trigger for irreversible retreat of the Antarctic ice sheet

E. A. Hill, G. H. Gudmundsson, et al.

Warmer ocean conditions are set to greatly influence ice loss in Antarctica, revealing alarming shifts in ice shelf stability. This research conducted by Emily A. Hill, G. Hilmar Gudmundsson, and David M. Chandler highlights the dire consequences of a transitioning cold-to-warm ocean regime, resulting in rapid ice retreat and drastic environmental changes.

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Playback language: English
Abstract
Warmer ocean conditions could significantly impact future ice loss from Antarctica by thinning and reducing the buttressing of ice shelves. This study uses an ice sheet model and ensemble ocean-circulation model data to quantify the impact of a cold-to-warm ocean regime shift in the Filchner–Ronne and Ross ice shelf cavities. The results show that this transition leads to destabilization and irreversible grounding line retreat in some locations, greatly accelerating ice loss and creating conditions similar to the present-day Amundsen Sea sector.
Publisher
Nature Climate Change
Published On
Sep 20, 2024
Authors
Emily A. Hill, G. Hilmar Gudmundsson, David M. Chandler
Tags
Antarctica
ice loss
ocean conditions
ice shelves
grounding line retreat
Filchner–Ronne
Ross

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